http://www.jb51.net/article/104068.htm
这篇文章主要为大家详细介绍了Android自定义view绘制圆环占比动画，具有一定的参考价值，感兴趣的小伙伴们可以参考一下一、实现效果图
二、核心代码
1.自定义MyProgressView.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 package com.czhappy.effectdemo.view; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.FontMetrics; import android.graphics.Rect; import android.graphics.RectF; import android.os.Handler; import android.os.Message; import android.text.TextUtils; import android.util.AttributeSet; import android.view.View; import com.czhappy.effectdemo.R; import com.czhappy.effectdemo.utils.ScreenUtil; public class MyProgressView extends View { // 画实心圆的画笔 private Paint mCirclePaint; // 画圆环的画笔 private Paint mRingDefaultPaint; // 已用环的画笔 private Paint mUsePaint; // 画圆环的画笔 private Paint mRingPaint; // 画白线的画笔 private Paint mLinePaint; // 画字体的画笔 private Paint mTextPaint; // 圆形颜色 private int mCircleColor; // 圆环颜色 private int mRingColor; // 半径 private float mRadius; // 圆环半径 private float mRingRadius; // 圆环宽度 private float mStrokeWidth; // 圆心x坐标 private int mXCenter; // 圆心y坐标 private int mYCenter; // 字的长度 private float mTxtWidth; // 字的高度 private float mTxtHeight; // 总进度 private int mTotalProgress = 100 ; // 当前进度 private int mProgress; // 实际展示总进度 private int mShowProgress; // 已用流量 private String usedFlow; private Context mContext; private Handler circleHandler = new Handler(){ public void handleMessage(Message msg) { super .handleMessage(msg); if (msg.what == 1 ){ int temp = (Integer)msg.obj; setProgress(temp); } }; }; public MyProgressView(Context context, AttributeSet attrs) { super (context, attrs); mContext = context; // 获取自定义的属性 initAttrs(context, attrs); initVariable(); } private void initAttrs(Context context, AttributeSet attrs) { TypedArray typeArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.TasksCompletedView, 0 , 0 ); mRadius = typeArray.getDimension(R.styleable.TasksCompletedView_radius, 80 ); mStrokeWidth = typeArray.getDimension(R.styleable.TasksCompletedView_strokeWidth, 10 ); mCircleColor = typeArray.getColor(R.styleable.TasksCompletedView_circleColor, 0xFFFFFFFF ); mRingColor = typeArray.getColor(R.styleable.TasksCompletedView_ringColor, 0xFFFFFFFF ); mRingRadius = mRadius + mStrokeWidth / 2 ; } private void initVariable() { //画圆画笔设置 mCirclePaint = new Paint(); mCirclePaint.setAntiAlias( true ); //防锯齿 mCirclePaint.setColor(mCircleColor); mCirclePaint.setStyle(Paint.Style.FILL); //“使用”字画笔设置 mUsePaint = new Paint(); mUsePaint.setAntiAlias( true ); mUsePaint.setStyle(Paint.Style.FILL); mUsePaint.setColor(getResources().getColor(R.color.ticket_color)); mUsePaint.setTextSize(ScreenUtil.sp2px(mContext, 10 )); //圆环画笔设置 mRingDefaultPaint = new Paint(); mRingDefaultPaint.setAntiAlias( true ); mRingDefaultPaint.setColor(getResources().getColor(R.color.default_ring_color)); mRingDefaultPaint.setStyle(Paint.Style.STROKE); mRingDefaultPaint.setStrokeWidth(mStrokeWidth); //已使用多少圆环画笔设置 mRingPaint = new Paint(); mRingPaint.setAntiAlias( true ); mRingPaint.setColor(mRingColor); mRingPaint.setStyle(Paint.Style.STROKE); mRingPaint.setStrokeWidth(mStrokeWidth); mTextPaint = new Paint(); mTextPaint.setAntiAlias( true ); mTextPaint.setStyle(Paint.Style.FILL); mTextPaint.setColor(Color.BLACK); mTextPaint.setTextSize(ScreenUtil.sp2px(mContext, 22 )); mLinePaint = new Paint(); mLinePaint.setColor(Color.WHITE); //获取字体高度 FontMetrics fm = mTextPaint.getFontMetrics(); mTxtHeight = ( int ) Math.ceil(fm.descent - fm.ascent); } @Override protected void onDraw(Canvas canvas) { mXCenter = getWidth() / 2 ; mYCenter = getHeight() / 2 ; //画圆 canvas.drawCircle(mXCenter, mYCenter, mRadius, mCirclePaint); RectF oval = new RectF(); oval.left = (mXCenter - mRingRadius); oval.top = (mYCenter - mRingRadius); oval.right = mRingRadius * 2 + (mXCenter - mRingRadius); oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius); //画整圆弧 canvas.drawArc(oval, - 90 , 360 , false , mRingDefaultPaint); //已使用多少圆弧 canvas.drawArc(oval, - 90 , (( float ) mProgress / mTotalProgress) * 360 , false , mRingPaint); //文字绘制 String txt = mProgress + "%" ; //文字的长度 mTxtWidth = mTextPaint.measureText(txt, 0 , txt.length()); canvas.drawText(txt, mXCenter - mTxtWidth / 2 , mYCenter + mTxtHeight / 9 , mTextPaint); Rect _pb = new Rect(); String sup = "已用" ; mUsePaint.getTextBounds(sup, 0 , sup.length(), _pb); int perX = mXCenter - _pb.width() / 2 ; canvas.drawText(sup, perX, mYCenter / 2 , mUsePaint); if (!TextUtils.isEmpty(usedFlow)) { mUsePaint.getTextBounds(usedFlow, 0 , usedFlow.length(), _pb); perX = mXCenter - _pb.width() / 2 ; canvas.drawText(usedFlow, perX, ( float ) (mYCenter + mYCenter / 1.7 ), mUsePaint); } //画横线图片 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.circle_bottom_bg); perX = mXCenter - bitmap.getWidth() / 2 ; canvas.drawBitmap(bitmap, perX, ( float ) (mYCenter + mYCenter / 5 ), mLinePaint); } /** * 设置当前进度 * @param progress */ public void setProgress( int progress) { mProgress = progress; postInvalidate(); } /** * 实际展示总进度 * @param progress */ public void setmShowProgress( int progress) { mShowProgress = progress; new Thread( new CircleThread()).start(); } public void setUsedFlow(String usedFlow) { this .usedFlow = usedFlow; } private class CircleThread implements Runnable{ int m= 0 ; int i= 0 ; @Override public void run() { // TODO Auto-generated method stub while (!Thread.currentThread().isInterrupted()){ try { Thread.sleep( 50 ); m++; Message msg = new Message(); msg.what = 1 ; if (i < mShowProgress){ i += m; } else { i = mShowProgress; return ; } msg.obj = i; circleHandler.sendMessage(msg); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }
2.FlowActivity.java
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 package com.czhappy.effectdemo.activity; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.view.View; import com.czhappy.effectdemo.R; import com.czhappy.effectdemo.view.MyProgressView; /** * Description: * User: chenzheng * Date: 2017/1/21 0021 * Time: 17:17 */ public class FlowActivity extends AppCompatActivity { private MyProgressView mTasksView; @Override protected void onCreate( @Nullable Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_flow); initView(); } private void initView() { mTasksView = (MyProgressView) findViewById(R.id.flow_prgress_view); } public void beginAnim(View view){ mTasksView.setUsedFlow( "200.0M" ); mTasksView.setmShowProgress( 60 ); } }
3.activity_flow.xml
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 <? xml version = "1.0" encoding = "utf-8" ?> < LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tc = "http://schemas.android.com/apk/res-auto" android:layout_width = "match_parent" android:layout_height = "match_parent" android:padding = "10dp" android:background = "#fff" android:gravity = "center_horizontal" android:orientation = "vertical" > < Button android:layout_width = "match_parent" android:layout_height = "wrap_content" android:onClick = "beginAnim" android:text = "开始动画" /> < com.czhappy.effectdemo.view.MyProgressView android:id = "@+id/flow_prgress_view" android:layout_width = "100dp" android:layout_height = "100dp" tc:circleColor = "@color/circle_color" tc:radius = "44dp" tc:ringColor = "@color/ring_color" tc:strokeWidth = "6dp" android:layout_marginTop = "10dp" /> </ LinearLayout >以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
